diff --git a/.idea/misc.xml b/.idea/misc.xml
index 96ce66b..dec2e7a 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="JavaScriptSettings">
+    <option name="languageLevel" value="ES6" />
+  </component>
   <component name="masterDetails">
     <states>
       <state key="ScopeChooserConfigurable.UI">